I can mill you beams cheaper than that. Pick up is in Idaho. We ju had a big wind storm come through. I am cutting trees up tomorrow and then will mill into beams/posts. Those are crazy prices for fir and pine.
Strength and density Doug fir
Source directly from someone that will mill directly for you - best quality and cost
Surface applied rather than pressure treating weatherization is adequate for other than ground contact as the natural tannins in cedar
Both still require maintenance even if a weathered appearance desired
Douglas fir is not actually a fir tree but like cedar a member of the pine family😀
